package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Lazy;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@RequiredArgsConstructor
@Slf4j
@Service
public class OrderServiceImpI implements OrderService {


    @Autowired
    private WeChatPayUtil weChatPayUtil;
    private final OrderMapper orderMapper;

    private final AddressBookMapper addressBookMapper;

    private final ShoppingCartMapper shoppingCartMapper;

    private final OrderDetailMapper orderDetailMapper;

    private final UserMapper userMapper;
    private final WebSocketServer webSocketServer;


    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理各种业务异常(地址簿异常，购物车数据异常)
        AddressBook addressBook = addressBookMapper.queryAddressBookById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList.size() == 0 && shoppingCartList == null) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orders.setAddress(addressBook.getDetail());
        orderMapper.insert(orders);
        List<OrderDetail> orderDetailList = new ArrayList();
        //向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());

            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);
        //清空当前用户的购物车数据
        ShoppingCartDTO shoppingCartDTO = new ShoppingCartDTO();

        shoppingCartMapper.cleanShoppingCart(userId);
        //封装Vo返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .orderTime(LocalDateTime.now())
                .id(orders.getId())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        /*JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }*/

        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单

        //发现没有将支付时间 check_out属性赋值，所以在这里更新
        LocalDateTime check_out_time = LocalDateTime.now();

        //获取订单号码
        String orderNumber = ordersPaymentDTO.getOrderNumber();

        log.info("调用updateStatus，用于替换微信支付更新数据库状态的问题");
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderNumber);
        //获取订单id
        Orders orders = orderMapper.getByNumberAndUserId(orderNumber, userId);
        //通过WebSocket向客户端浏览器推送消息 type orderId content
        Map map = new HashMap();
        map.put("type", 1);  //1表示来单提醒 2表示客户催单
        map.put("orderId", orders.getId());
        map.put("content", "订单号：" + orders.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        log.info("来单提醒：{}", JSON.toJSONString(map));

        return vo;
    }


    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */

    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);

    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);
                orderVO.setDeliveryTime(LocalDateTime.now());
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);

            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO OrderStatistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }


    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO queryOrderDetail(Long id) {
        //查询订单表
        Orders order = orderMapper.getById(id);
        String orderDishes = getOrderDishesStr(order);
        //查询订单明细表
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(order, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        orderVO.setOrderDishes(orderDishes);

        //合并两张表
        return orderVO;
    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     * @return
     */
    @Override
    public void CancelOrder(OrdersCancelDTO ordersCancelDTO) {
        //将状态变为已取消
        Integer status = Orders.CANCELLED;
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersCancelDTO, orders);

        orderMapper.cancelOrder(orders, status);


    }

    /**
     * 接单
     *
     * @param orders
     * @return
     */
    @Override
    public void confirmOrder(Orders orders) {
        //将状态变为已接单
        Integer status = Orders.CONFIRMED;
        orderMapper.cancelOrder(orders, status);
    }

    /**
     * 拒单
     *
     * @param orders
     * @return
     */
    @Override
    public void rejectionOrder(Orders orders) {
        //将状态变为已取消
        Integer status = Orders.CANCELLED;
        orderMapper.cancelOrder(orders, status);
    }

    /**
     * 派送订单
     *
     * @param orders
     * @return
     */
    @Override
    public void deliveryOrder(Orders orders) {
        //将状态改为派送中
        Integer status = Orders.DELIVERY_IN_PROGRESS;
        orderMapper.cancelOrder(orders, status);
    }

    /**
     * 完成订单
     *
     * @param orders
     * @return
     */
    @Override
    public void completeOrder(Orders orders) {
        Integer status = Orders.COMPLETED;
        orderMapper.cancelOrder(orders, status);

    }

    /**
     * 历史订单查询
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult queryHistoryOrders(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Long userId = BaseContext.getCurrentId();
        Page<Orders> page = orderMapper.queryHistoryOrders(ordersPageQueryDTO, userId);
        long total = page.getTotal();
        // 查询出订单明细，并封装入OrderVO进行响应
        //先判断一下page是否为空
        List<OrderVO> orderVOList = new ArrayList<>();
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }
        return new PageResult(total, orderVOList);
    }


    /**
     * 再来一单
     *
     * @param id
     * @return
     */

    public void repetitionOrder(Long id) {
        //根据id查询到原来订单中菜品信息
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            //这里的x代表的是  orderDetailList集合中每一个元素
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCart.setAmount(x.getAmount());
            return shoppingCart;
        }).collect(Collectors.toList());//Collectors.toList()来收集Stream中映射后的所有ShoppingCart对象到一个新的列表中

        //将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 取消订单
     *
     * @param id
     */
    @Override
    public void cancelOrder(Long id) {
        Integer status = Orders.REFUND;
        Orders order = Orders.builder().id(id).build();
        orderMapper.cancelOrder(order, status);
    }

    @Override
    public void reminderOrder(Long id) {
        Orders orders = orderMapper.getById(id);
        if(orders==null && orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type", 2);  //1表示来单提醒 2表示客户催单
        map.put("orderId", id);
        map.put("content", "订单号：" + orders.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        log.info("客户催单提醒：{}", JSON.toJSONString(map));

    }

}
